The B101e Chevrolet diagnostic trouble code (DTC) indicates “Electronic Control Unit Software – Security Code Not Programmed.” This error often surfaces when attempting to program new key fobs. This article details a personal experience with the Topdon Topscan PRO and the resulting B101E code on a Chevrolet Cruze, highlighting potential issues and solutions.
Topdon Topscan PRO and the B101E Code
The Topdon Topscan PRO advertises Immobilizer (IMMO) functionality, including key programming. However, a recent attempt to add a new OEM smart key fob to a Chevrolet Cruze using this tool resulted in the B101E DTC.
Initially, a full diagnostic scan revealed no DTCs. The IMMO module’s “Read Immobilizer Password” function succeeded using the “BCMAUTO” method but failed using the “ECM” and “ECM-Type01” methods.
Subsequently, attempting to add a smart key through the “Keyless System (CAN)” module presented challenges. While the tool correctly identified the existing four keys, the “Add Smart Key” process encountered problems. After entering the PIN and placing the new fob in the designated slot, the software hung on the “wait 12 minutes” screen. A second attempt resulted in a fleeting “wait 12 minutes” message followed by the error “78: The request message is received correctly, and the response is pending.” Confirming this message returned to the main menu, and the new fob remained unprogrammed.
A subsequent diagnostic scan revealed the B101E DTC. Further attempts to read the immobilizer password using all three methods failed.
Topdon support, when contacted regarding these issues and providing the specific error messages, responded that the device does not support reading the password PIN and recommended using a professional original manufacturer device (support ticket 38607).
Possible Implications of the B101E Code after Using Topdon Topscan PRO
The appearance of the B101E DTC after using the Topdon Topscan PRO, coupled with the initial successful PIN read and subsequent failure, raises concerns about potential corruption of the immobilizer password within the ECM. This situation underscores the importance of using manufacturer-approved diagnostic and programming tools for security-sensitive operations like key fob programming. While aftermarket tools may offer attractive features, their compatibility and reliability can be questionable, potentially leading to costly and time-consuming issues.
Conclusion
Experiences with the Topdon Topscan PRO resulting in the B101E DTC on a Chevrolet Cruze highlight the risks associated with using non-manufacturer approved tools for key programming. This situation emphasizes the importance of relying on professional equipment and expertise when dealing with vehicle security systems. While the Topdon Topscan PRO might be suitable for other diagnostic tasks, its IMMO functionality appears unreliable for certain Chevrolet models, potentially leading to ECM issues and the need for professional intervention.
